Annotation of src/usr.bin/leave/leave.c, Revision 1.19
1.19 ! tb 1: /* $OpenBSD: leave.c,v 1.18 2018/02/09 23:12:13 cheloha Exp $ */
1.1 deraadt 2: /* $NetBSD: leave.c,v 1.4 1995/07/03 16:50:13 phil Exp $ */
3:
4: /*
5: * Copyright (c) 1980, 1988, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.9 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/time.h>
1.11 otto 34: #include <ctype.h>
35: #include <err.h>
36: #include <stdio.h>
37: #include <stdlib.h>
1.3 deraadt 38: #include <unistd.h>
1.1 deraadt 39:
1.11 otto 40: static __dead void usage(void);
41: static void doalarm(u_int secs);
42:
43: #define SECOND 1
44: #define MINUTE (SECOND * 60)
45: #define FIVEMIN (5 * MINUTE)
46: #define HOUR (MINUTE * 60)
1.3 deraadt 47:
1.1 deraadt 48: /*
49: * leave [[+]hhmm]
50: *
51: * Reminds you when you have to leave.
52: * Leave prompts for input and goes away if you hit return.
53: * It nags you like a mother hen.
54: */
1.3 deraadt 55: int
1.10 deraadt 56: main(int argc, char *argv[])
1.1 deraadt 57: {
1.6 mpech 58: u_int secs;
59: int hours, minutes;
60: char c, *cp;
1.3 deraadt 61: struct tm *t;
62: time_t now;
1.11 otto 63: int plusnow = 0, twentyfour;
1.1 deraadt 64: char buf[50];
1.16 deraadt 65:
1.17 deraadt 66: if (pledge("stdio proc", NULL) == -1)
67: err(1, "pledge");
1.16 deraadt 68:
1.14 millert 69: if (setvbuf(stdout, NULL, _IOLBF, 0) != 0)
1.11 otto 70: errx(1, "Cannot set stdout to line buffered.");
1.1 deraadt 71:
72: if (argc < 2) {
1.11 otto 73: (void)fputs("When do you have to leave? ", stdout);
1.1 deraadt 74: cp = fgets(buf, sizeof(buf), stdin);
75: if (cp == NULL || *cp == '\n')
1.19 ! tb 76: return 0;
1.5 pjanzen 77: } else if (argc > 2)
78: usage();
79: else
1.1 deraadt 80: cp = argv[1];
81:
82: if (*cp == '+') {
83: plusnow = 1;
84: ++cp;
85: }
86:
87: for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
1.13 deraadt 88: if (!isdigit((unsigned char)c))
1.1 deraadt 89: usage();
90: hours = hours * 10 + (c - '0');
91: }
92: minutes = hours % 100;
93: hours /= 100;
1.11 otto 94: /* determine 24 hours mode */
95: twentyfour = hours > 12;
1.1 deraadt 96:
97: if (minutes < 0 || minutes > 59)
98: usage();
99: if (plusnow)
1.11 otto 100: secs = (hours * HOUR) + (minutes * MINUTE);
1.1 deraadt 101: else {
1.3 deraadt 102: if (hours > 23)
1.1 deraadt 103: usage();
1.11 otto 104: (void)time(&now);
105: t = localtime(&now);
106: while (t->tm_hour > hours ||
1.4 espie 107: (t->tm_hour == hours && t->tm_min >= minutes)) {
1.11 otto 108: if (twentyfour)
1.4 espie 109: hours += 24;
110: else
111: hours += 12;
112: }
113:
1.11 otto 114: secs = (hours - t->tm_hour) * HOUR;
115: secs += (minutes - t->tm_min) * MINUTE;
1.18 cheloha 116: secs -= t->tm_sec; /* aim for beginning of minute */
1.1 deraadt 117: }
118: doalarm(secs);
1.19 ! tb 119: return 0;
1.1 deraadt 120: }
121:
1.11 otto 122: static void
1.10 deraadt 123: doalarm(u_int secs)
1.1 deraadt 124: {
1.6 mpech 125: int bother;
1.3 deraadt 126: time_t daytime;
1.8 mpech 127: pid_t pid;
1.1 deraadt 128:
1.11 otto 129: switch (pid = fork()) {
130: case 0:
131: break;
132: case -1:
133: err(1, "Fork failed");
134: /* NOTREACHED */
135: default:
1.1 deraadt 136: (void)time(&daytime);
137: daytime += secs;
1.8 mpech 138: printf("Alarm set for %.16s. (pid %ld)\n",
139: ctime(&daytime), (long)pid);
1.1 deraadt 140: exit(0);
141: }
1.11 otto 142: sleep(2); /* let parent print set message */
1.1 deraadt 143:
144: /*
145: * if write fails, we've lost the terminal through someone else
146: * causing a vhangup by logging in.
147: */
148: if (secs >= FIVEMIN) {
149: sleep(secs - FIVEMIN);
1.11 otto 150: if (puts("\a\aYou have to leave in 5 minutes.") == EOF)
1.1 deraadt 151: exit(0);
152: secs = FIVEMIN;
153: }
154:
1.11 otto 155: if (secs >= MINUTE) {
156: sleep(secs - MINUTE);
157: if (puts("\a\aJust one more minute!") == EOF)
1.1 deraadt 158: exit(0);
1.18 cheloha 159: secs = MINUTE;
1.1 deraadt 160: }
161:
1.18 cheloha 162: sleep(secs);
163:
1.1 deraadt 164: for (bother = 10; bother--;) {
1.11 otto 165: if (puts("\a\aTime to leave!") == EOF)
1.1 deraadt 166: exit(0);
1.18 cheloha 167: if (bother)
168: sleep(MINUTE);
1.1 deraadt 169: }
170:
1.11 otto 171: puts("\a\aThat was the last time I'll tell you. Bye.");
1.1 deraadt 172: exit(0);
173: }
174:
1.11 otto 175: static __dead void
1.10 deraadt 176: usage(void)
1.1 deraadt 177: {
178: fprintf(stderr, "usage: leave [[+]hhmm]\n");
179: exit(1);
180: }
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